Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 15, Pages 4963-4967Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201814605
Keywords
carbon nanomaterials; electrocatalysis; iron; oxygen reduction reaction; supramolecular precursors
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Funding
- National Key Research and Development Program [2016YFA0200102, 2016YFA0202500]
- National Natural Science Foundation of China [21825501]
- Tsinghua University Initiative Scientific Research Program
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The preparation of carbon materials usually involves the decomposition of precursors and the reorganization of the as-generated fragments. However, the cleavage of bonds and the simultaneous formation of new bonds at nearly the same positions prevents effective yet precise fabrication. Herein, a supramolecular precursor, cucurbit[6]uril, that contains multiple bonds with distinct bond strengths is proposed to decouple the twin problem of simultaneous bond cleavage and formation, allowing multistage transformations to hierarchical porous carbon and metal-doped carbon in a single yet effective pyrolysis step without the need of a template or additional purification. As a proof-of-concept, the Fe-doped carbon electrocatalysts realized a Pt/C-like half-wave potential of 0.869 V vs. RHE and small Tafel slope of 51.3 mVdec(-1) in oxygen reduction reaction.
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